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Paper Abstract and Keywords
Presentation 2021-05-13 14:25
A Study on Privacy Concerns by Single-Word Search Query Leakage from Web Browsers through Domain Name System
Katsuki Isobe, Daishi Kondo, Hideki Tode (OPU) NS2021-18
Abstract (in Japanese) (See Japanese page) 
(in English) Some web browsers used in some specific computers have a specification that a single-word search query (a word that contains neither spaces nor certain types of symbols) entered in the search bar is sent to the domain name system (DNS) cache server as a DNS request including the word as a domain name before being sent to the search engine. Since such browser behavior is unexpected by the users, researchers have reported privacy concerns by the single-word search query leakage. This paper refers to such behavior as the ``search query leakage issue'' and presents the results of a survey on the behavior and conditions under which this issue occurs. Then, using a DNS traffic dataset captured at DNS cache servers, we demonstrate that a considerable number of search queries are leaked. Finally, we propose a method to evaluate how much the occurrence of this problem affects the privacy of users based on the distributed representation of words and its clustering, and show that it is possible to infer the tendency of user interests.
Keyword (in Japanese) (See Japanese page) 
(in English) Domain name system / Privacy / Web browser / Word embedding / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 17, NS2021-18, pp. 20-25, May 2021.
Paper # NS2021-18 
Date of Issue 2021-05-06 (NS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NS2021-18

Conference Information
Committee NS  
Conference Date 2021-05-13 - 2021-05-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) High level protocol, Networking technologies (IP and high-layer routing/filtering, Multicast, Quality/Routing control), IP network application technologies (P2P, P4P, Overlay, SIP, NGN), Network system related technologies (System configuration, Interface, Architecture, Hardware/Software/Middleware), Security, Blockchain etc. 
Paper Information
Registration To NS 
Conference Code 2021-05-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Privacy Concerns by Single-Word Search Query Leakage from Web Browsers through Domain Name System 
Sub Title (in English)  
Keyword(1) Domain name system  
Keyword(2) Privacy  
Keyword(3) Web browser  
Keyword(4) Word embedding  
1st Author's Name Katsuki Isobe  
1st Author's Affiliation Osaka Prefecture University (OPU)
2nd Author's Name Daishi Kondo  
2nd Author's Affiliation Osaka Prefecture University (OPU)
3rd Author's Name Hideki Tode  
3rd Author's Affiliation Osaka Prefecture University (OPU)
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Speaker Author-1 
Date Time 2021-05-13 14:25:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2021-18 
Volume (vol) vol.121 
Number (no) no.17 
Page pp.20-25 
Date of Issue 2021-05-06 (NS) 

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